Home / 21,108.98-29,133.54-13,153.76

Finding the Fourth Proportional to 21,108.98, 29,133.54 and 13,153.76

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Solution

The fourth proportional to 21,108.98, 29,133.54 and 13,153.76 is: 18,154.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,108.98 : 29,133.54 = 13,153.76 : x
  2. Step 2: Convert to fraction form
    21,108.98/29,133.54 = 13,153.76/x
  3. Step 3: Cross multiply
    21,108.98x = 29,133.54 × 13,153.76
  4. Step 4: Simplify right side
    21,108.98x = 383,215,593.11
  5. Step 5: Solve for x
    x = 383,215,593.11/21,108.98
  6. Step 6: Final answer
    x = 18,154.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.